I picked up a monster 21 inch Whitman & Barnes adjustable wrench without a patent number or anything except on one side of the fixed jaw the brand Whitman & Barnes with 'Chicago USA' underneath, and on the other side of the fixed jaw W & B Co in a diamond pattern, with the words 'Made in USA' and 'Warranted' underneath. I have attached a photo to show the mechanism. Im looking for any info on a date, and any thoughts on value.